Description of problem:
After updating some gems, running "rails server" and entering a specific URL on Rails app causes that bug repeatedly.

Version-Release number of selected component:
ruby-1.9.3.362-24.fc18

Additional info:
backtrace_rating: 4
cmdline:        /usr/bin/ruby script/rails server
crash_function: rb_bug
executable:     /usr/bin/ruby
kernel:         3.7.2-201.fc18.x86_64
remote_result:  NOTFOUND
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #2 rb_bug at error.c:284
 #3 sigsegv at signal.c:609
 #5 rb_vm_make_env_object at vm.c:485
 #6 rb_vm_make_proc at vm.c:562
 #7 vm_make_proc_from_block at vm.c:546
 #8 rb_vm_make_env_object at vm.c:488
 #9 rb_vm_make_proc at vm.c:562
 #10 vm_make_proc_from_block at vm.c:546
 #11 rb_vm_make_env_object at vm.c:488
 #12 rb_vm_make_proc at vm.c:562

Potential duplicate: bug 704606